Grease-dispensing device



Feb. 21, 1928.

L GOODMAN GREASE DISPENSING DEVICE Flled Nov 21, 1925 IE 'IE l FIE EATTORNEYS Patented F eb. 21, 1928.

"UNITED STATES LOUIS GOODMAN, OF SAN FRANCISCO, CALIFORNIA.

GREASE-DISPENSING DEVICE.

A pplioation filed November 21, 1925. Serial No. 70383.61 7

This invention relates to devices which are employed to dispenselubrlcating grease into bearings at high pressures Such devicesarecommonly known as grease guns and are generally used for lubricatingthe bearings of motor Vehicles. They are usually constructed so thatthey may be detachably secured tothe bearings and are provided with agrease chamber together with. means for discharging the grease from thechamber at high pressure. p

It is an object of this invention to construct a dispensing device ofthis class in which means is provided for automatically feeding greasefrom the grease chamber into the high pressure means for discharging thesame. It is proposed to actuate the feeding means through theinstrumentality of the same hand lever which is employed to actu-- atethe high pressure means.

It is a further object "of this invention to employ pneumatic pressurefor feeding grease from the grease chamber to the means for dischargingthe grease at high. pressure, and to automatically maintainv thispneumatic pressure upon actuating the high pressure discharging means.It is proposed to provide an air pump for pumping the air into thegrease chamber, a plunger for dis charging the grease at high pressureand a.

single hand lever for and lunger. It,1s a further object of thisinvention operating both pump construct a grease dispensing device in pwhich a common hand lever actuates both the feeding mechanism and thehigh pressure discharging means and in which the high pressuredischarging means is in the form of a plunger disposed transversely ofthe grease chamber and adjacent one end thereof.

It is a further object of this invention to provide means for preventingthe air pres,- sure from blowingv through the body of the grease. It isV on the surfaceof the grease which is adapted to carry the pressure ofthe air.

. Further objects of he invention will appear from the followingdescription in which the preferred embodiment of the invention has beenset forth.

Referring to the drawings: 1;

Figure'l is a side elevation of the device of this invention, certainparts being shown in section.

proposed. to provide a follower i Fig. 2 is a section along the line 2-2of Fig.

Fig.3 is a section along the line 3-3 of Fig. 1. v i

The device comprises generally a body portion 10 to which is suitablysecured a grease chamber 11 as by means of a threaded engagement 12. Thegrease chamberll is adapted to contain a charge of grease 13 and meansare provided ont'he body portion for expelling grease. from the deviceat hi h pressure and for causing grease from the chamber 11 to beautomatically fed into the means for discharging the grease. The meansfor dischargin grease at high pressure comprises a reciprocating:plunger 14 which may be actuated by means of a hand lever 15.

As shown in Fig. 1, the handlever 15 is operatively connected to theplunger 14 by means of a pluralit of links. Thus the body portion isprovlded with a pair of bifurcated lugs 16-and 17 to which are pivotallysecured the links 18 and 19 respectively. The hand lever 15 is providedwith a bifurcatedend portion 20, one end of which is pivotally securedtothe link 18 as by means of apin 21. The lower end of this bifurcatedportion is pivotally secured to the plunger 14 as by means of a pin 22.The link 19 at its upper end is pivotally secured to the link 23 bymeans of a pin 24 and the link 23 is in turn pivotally connected to thein'22. The arrangement of the links is such that the angle made by theline of centers of the pivot pin 24 and. the pin 22 with the-horizontalis substantially equal .to I

the angle made by the line -of centers between the'pivot in 21 and thepin 22with the horizontal.

high

downward stroke and therefore very pressures can be obtained.

' chamber 11 through the port28 which is provided within the bodyportion and is adapted to discharge the grease at high pressure throughthe discharge fitting 29.

y means of this mechanism the leverage obtained b the hand lever 15increases as it approae es the end of its The means for automaticallyfeeding the grease from the grease chamber through the outlet 28comprisesgenerally an air pum which is also actuated b meansof a hanlever and which is adapted to pump'air into the grease chamber to placethe grease under the fluid pressure. Thus a relatively larger bore 31 isprovided in the body portion 10 andarranged adjacent to and parallel tothe bore 26. Disposed-in this bore there is apiston 32 which is providedwith a cup washer 33 at its lower end whereby it will make anair tightfit with the bore. The

rounded by means of a threaded cylindrical casing 37 whicl is detachablysecured to the body portion 10 by any suitable means such as a threadedengagement 38. The inner surface of the casing 381s spaced from theouter surface of the grease chamber 11 and is in communication with thecheck valve 36 by means of a port 39. Thus air WhlCh is pumped bymeansof the piston 32 is adapted to pass around the grease chamber 11 andinto the open end thereof to press downward upon the body of the grease13. The outer end of the piston 32 is preferably pivotally connected tothe same pin 22 which pivotally connects the plunger 14 to the handlever 15 whereby manual operation of the hand lever 15 will actuate boththe high i the casing 37 ma portion 10, or.

pressure plunger and the air pump piston.

While the-device as above described comprises an operable combination itis preferable to provide some sort of means to prevent the air fromblowing down through the body of the grease '13. Thus there is provideda follower 40 including a cup washer 41 which fits within thecylindrical grease chamber -11 and is adapted to rest upon the surfaceof the body of grease 13. In order to provide means for withdrawing thisfollower from thegrease chamber to allow a fresh charge of grease to beinserted, the follower is preferably connected to the outer end 42-ofthe casing'37 as by means of a flexible connection such as a-chain 43havin its one end connected to e e bolt 44 provi ed on the follower 40an its other endconnected to an e yr e bolt 45 mounted upon the outerend 42. he chain 43 is made sufliciently long that the follower maytravel down to the end of the grease chamber 11.-

Then to remove the follower for the purpose of inserting a new chargeofgrease either be removed from the body e end portion 42 may be removedfrom the casing 37 and the follower 40 retracted from the grease chamber11. To facilitate entrance of the cup washer 41 into the end of thegrease chamber'll,

the outer end of this chamber is provided with a belled portion 46. i

In operation a charge of grease is placed 3 the air piston 32 it causesanair pressure" to be built up in the grease chamber 11 to press uponthe follower 40 and place the grease charge under a fluid pressure tocause the grease to be fed through the outlet port.

28 and operates the plunger 14 to dischargegrease at high pressure thruthe outlet fitting 29. The provision of the outer casing.

37 protects the grease chamber 11 and makes it possible to obtain access,to the grease chamber without causing the compressed air to scattergrease over the operator when the parts are first disconnected. p p Itis to be understood that the word grease as usedin the specificationand.

claims refers to any lubricating material, whether a liquid or asemi-liquid.

I claim:

1. A grease dispensing device comprisin a body member, a grease chamber.mounted on said body member, an air pump mounted.

on said body member and adapted to discharge air in said grease chamber,means including a high pressure plunger in said member adapted toreceive grease from said chamber and discharge the same thru an.

outlet, and means including a single manually operable lever foractuating both said pump and plunger.

2. A grease ispensing device comprising a greasechamber having an outletopening, means for discharging air under pressure in said chamber toforce grease thru said outlet, means for discharging grease at highpressure adapted to receive grease forced thru said outlet, and commonoperatin means for manually operating both sai means for discharging airand said means for dischargingi grease at high pressure.

3. A" grease ispensing device com rising means for discharging grease,at big pressure, pneumatic means for feeding grease at a substantiallylower pressure into said means, and means includin a common operatingmember for manna 1y effecting operation of said first two meanssimultaneously.

4. A .fgrease dispensing device com rising I tuated by operation of saidlever.

'6. A grease dispensing device comprising an elongated grease chamber, ahigh pressure ump havin its inlet connected with q said 0 amber and itsplunger dlsposed trans- .verse of said chamber and adjacent one end ofthe same, said plunger being adapted to discharge grease expelled fromsaid chamher, a pivoted hand lever arranged to extend longitudinally ofsaid chamber and operably connected with said plunger, and

, means also operably connected to said lever for pneumaticallyexpelling grease from an said chamber.

7. A grease dlspensing devlce comprising a body member, a combinationair and grease pump disposed in said member, a

grease chamber secured to said member and.

adapted to receive air from said pump and to feed grease'to said pump,and an operating lever for actuating "said pump whereby grease is forcedout of said chamber by pneumatic pressure and discharged from saiddevice at high pressure.

8. A grease dispensing device comprising a shell adapted to contain acharge of grease,

a hand lever pivotally secured to said shell,

means operated by said hand lever for maintaining a fluid pressure onsaid grease, an outlet from said chamber, high pressure dischargingmeans in communication with said outlet and means for operatively connecting said high pressure means with said lever. v

9. A grease dispensing .device comprising a. grease chamber, pneumaticmeans for feeding grease from said chamber, meansfor discharging thegrease fed from said chamberiat high pressure, and means including asingle hand lever for actuating both said means.

10.. In a grease dispensing device, a body portion, a pneumatic pumpdisposed in said portion, a grease pump likewise disposed in saidportion, a slngle lever for actuating both of said pumps, and a greasechamberv secured to said body portion, said chamber being incommunication with the outlet of the air'pump and the inlet of thegrease pump.

11, In a grease dispensing device,.a body portion, a grease chambermountedon said body portion, a pneumatic pump disposed within saidportion and having'its discharge outlet communicating with saidchamber,a grease pump likewise disposed within said portion and having itsintake communicat-. ving w1th said chamber, and a common actuator forboth of said pumps.

In testimony whereof, I have hereunto set my hand.

LOUIS: GOODMAN.

